Delta RMC101 - Manual (Page 777)

Appendix C: Parameter Field Reference
C-7
C.1.6 Configuration Bits - Resolver Specific
Bits 12 - Resolver Resolution
This bit selects the resolution of the resolver feedback.
0 = 14-bit resolution
1 = 16-bit resolution
The counts from the resolver interface will always be a 16-bit number regardless of the resolution
selected. With 14-bit resolution, bits 0 and 1 in the counts (the least significant bits) will always be
zero.
Using 14 bits allows operation at higher speeds and accelerations than with 16 bits. See the
Resolver Specifications for details.
C.1.7 Scale
Default: Transducer specific
Range: -32768 to 32767
This scale is used on MDT, SSI, Analog position axes with the Offset parameter and the Prescale
Divisor bits of the Config word to convert the Transducer Counts to an Actual Position.
Quadrature axes use this parameter with the Prescale Divisor bits to convert from the change in
Transducer Counts to a change in the Actual Position. Resolver axes use this parameter together
with the Count Offset to calculate the Actual Position.
For details on converting counts to position units see the appropriate topics for your transducer
types:
• Analog Scaling
• MDT Scaling
• Quadrature Scaling
• SSI Scaling
• Stepper Scaling
• Resolver Scaling
Note: When the Scale is set to 0, it is treated as though the Scale is set to 32768. This allows a
one-to-one relationship between counts and position units. Similarly, a Scale value of -32768
represents a negative one-to-one relationship between counts and position units (increasing
counts mean decreasing position units).
Note: You should never set the Scale below 16383 (except for resolver axes). If it does go
below that value, then use the Prescale Divisor bits in the Configuration Word. For details, refer
to the discussion on scaling for your transducer type.
Note: In RMC100 CPU firmware prior to 19991216, Scale could not be 0 or -32768 for MDT,
SSI, and analog transducers.